Moved radio configuration from Plugins to the TV section
- removed radio plugin's configuration form
- added a new radio client subsection to the TV section
- replaced all database accesses by new GetRadioChannelGroupNames() TvController interface call
- rearranged settings between the TV and the TV Client section
- all configuration sections use TV.hostname for TV server access
Beautifications and fine tuning
Hostname can now be selected
from a list of TV servers available in the loacal network.
The TV config sections are reordered and renamed